linux-kernel - Re: [patch V2 16/17] init: Introduce SYSTEM

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Message-ID: <eaa3bafa-3e88-ef27-78a1-aaedc182621b@oracle.com>
Date:   Wed, 17 May 2017 17:15:17 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Juergen Gross <jgross@...e.com>
Subject: Re: [patch V2 16/17] init: Introduce SYSTEM_SCHEDULING state

On 05/16/2017 02:42 PM, Thomas Gleixner wrote:
> might_sleep() debugging and smp_processor_id() debugging should be active
> right after the scheduler starts working. The init task can invoke
> smp_processor_id() from preemptible context as it is pinned on the boot cpu
> until sched_smp_init() removes the pinning and lets it schedule on all non
> isolated cpus.
>
> Add a new state which allows to enable those checks earlier and add it to
> the xen do_poweroff() function.
>
> No functional change.
>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: Juergen Gross <jgross@...e.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>